HYELEC MS88 Multifunction Digital Multimeter/Auto and Manual Range/Frequency/RelativeThis instrument complies with IEC 61010-1, CAT. III 1000V and CAT.IV 600V overvoltage standards. See Specifications.To get the best service from this instrument, read carefully this user's manual and respect the detailed safety precautions.International symbols used on the Meter and in this manual are explained in chapter 1.1.3